erudition vs sagacity

erudition

noun
  • Profound knowledge acquired from learning and scholarship. 

  • The refinement, polish and knowledge that education confers. 

sagacity

noun
  • The quality of being sage, wise, or able to make good decisions; the quality of being perceptive, astute or insightful. 

  • See Thesaurus:wisdom 

How often have the words erudition and sagacity occurred in a corpus of books? (source: Google Ngram Viewer )